Internal-combustion engine



Nov. 25, 1924. 1,516,546

R. ORR

INTERNAL COMBUSTION ENGINE il July 20 192} 2 Sheets-Sheet 1 living Nov. 25, 1924. 1,516,546

R. ORR

INTERNAL COMBUSTION ENGINE Filed July 20. L92] 2 5heets$heet 2 [72 2/972 (or fiaari 0717 Iii/077257 Patented Nov. 25, 1924.

UNEEEE STATES ROBERT ORR, OF MONTREAL, QUEBEC, CANADA.

INTERNAL-COMBUSTION ENGINE.

Application filed July 20, 1921.

To all whom it may concern:

Be it known that I, ROBERT ORR, a subject of the King of Great Britain, residing at Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Internal-Combustion Engines; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to new and useful improvements in internal combustion engines.

The primary object of the invention is the provision of an internal combustion engine which employs the use of a pair of oppositely working pistons in each cylinder designed to give greater efficiency as well as increased capacity which is more compact in structure and more economical in the consumption of fuel, and which is as cheap as the ordinary reciprocating internal combustion engine now in common use, and which has all of the advantages of the long stroke and expansion without the resultant objection of excessive piston speed.

Another object of the invention is the provision of an internal. combustion engine having a relatively small stationary circumferential surface in its explosive chamber which prevents loss of fuel in the carbonizing of the surfaces and consequently the reduction of the heating of the interior of the cylinders, and in which the wear is minimized by the short stroke necessary to give the desired and required power.

A further object of the invention is the provision of an internal combustion engine such as above referred to, in which the initial compression is greatly increased by the double pistons in the cylinders which are novelly connected to the crank shaft of the engine for imparting the desired power thereto through a short stroke, thus greatly increasing the efficiency of the engine in every respect.

A still further object of the invention is the provision of an engine such as above referred to, which will be comparatively simple and inexpensive to manufacture, reliable and efficient in use, and readily op erated.

With the above and other objects in view, the present invention resides in the novel features of construction, formations, com- Serial No, 486,137.

Figure 1 is a longitudinal sectional view taken through the engine constructed in accordance with the present invention; and,

Figure 2 is a transverse sectional view thereof.

Referring now to the accompanying drawing by corresponding characters of reference throughout the several views, the numeral 5 designates in general my improved internal combustion engine which comprises a base 6 provided with the usual bearings 7 in which is journaled the crank shaft 8 having the usual throws 9 to which the customary connecting rods 10 are attached and also a central throw 11 which is connected to a slipper 13 by the pit-man 12 which operates in a guide 13 secured to the central portion of the base 6. The cylinders are shown at- 14 and are cast preferably in pairs having surrounding water jackets 15. Lower pistons 16 of tllGHSLb al construction operate in the cylinders 14; from the lower end thereof, preferably to a point intermediate the ends, while operat ing from the upper ends of the cylinders downwardly toward the before described pistons 16 are the upper pistons 17. These pistons 17 are carried by the connecting rods 18 which are pivoted at their upper ends as at 19 to the rocker arms 20, the latter being pivoted intermediate their ends, as at 21 to the brackets 22 provided upon the upper ends of the pairs of cylinders. Links 23 cdnnect the inner ends of the rocker arms 20 to the pitman 12 above referred to, and obviously as the crank 8 rotates, the pistons 16 will be moved upwardly and downwardly within the cylinders in the opposite direction to the upper pistons 17 which cooperate therewith, as clearly shown in the drawing. The sets of cylinders are offset, as shown at 24 intermediate the ends thereof, at which point when the pistons have moved to their extreme innermost positions, they will be spaced apart forming combustion chambers 25 whichcommunicate through the ports 26 with the side compartment 27 formed in the extension 24:, which compartment is provided with the usual intake and outlet ports shown at 27 controlled by the intake and exhaust valves 28 through the usual cam shaft 29. Spark plugs 30 may likewise be employed to ignite the charge.

The operation of the engine is as follows: Upon the rotation of the crank shaft the proper pistons will be moved to and from each other and at the desired time when the fuel is pressed between the pistons upon reaching their innermost position, the charge which is thus pressed will be ignited by the proper spark plug 30. The valves 28 controlling the intake and exhaust of the fuel to the combustion chambers in the usual manner.

From the foregoing description taken in connection with the accompanying draw ing, it will be manifest that an internal combustion engine of the nature described is provided which will fulfil all of the necessary requirements of such a device, and it should be understood in this connection, that various minor changes in the specific details of construction can be resorted to within the scope of the appended claims, without departing from the spirit or sacrificslipper to the crank shaft, connecting rods pivoted to the upper pistons, a rocker arm pivoted to th outer endof each of said last named connecting rods, and a link connecting each rocker arm to the slipper.

2. In an internal combustion engine, a pair of adjacent cylinders, a guide memher at one side of said cylinders, a pair of pistons operable in each of said cylinders, a crank shaft disposed beneath said cylinders, connecting rods between the lower pis tons and said crank shaft, a rocker arm pivoted above said cylinders, connecting rods pivoted to the upper pistons and to the end of said rocker arm, a slipper operable in said guide member, a Hpitmanconmeeting said slipper to the crank shaft, and a link pivoted to said slipper and to one end of said rocker arm,

In witness whereof I have hereunto setmy hand.

ROBERT ORR. 

